【Shell width】 Fit frames with 68/73mm bottom bracket shells.
【Thread】 BC1.37-inch*24T L/R Threaded Connection design enhance lateral stability to avoid creaking sound.
【Material】 BUCKLOS BSA Bottom Bracket characterize cold-forged machined aluminum alloy cups, dual-labyrinth bearing covers and precision sealed bearings, weight about 74.7g.
【Application】Designed for road bike, they are perfect match 29mm crank spindle.
【Service】if you have any other questions, you can contact us,we will help you within 24 hours.